-5(n+2)-(3+6n)=-12n

Question

I know i have to multiply -5n and n and -5n  by two and then my equation reads

-5n+10-3+6=-12n but after that i sort of lose what im supposed to do.

Answer 1

Hi, Clifford.

You're right when you say that you need to multiply the neg 5 by n and by 2.  But be careful with your signs...
-5 * n = -5n
-5 * 2 = -10 (not pos 10)

After you do that you multiply the second grouping by -1 (the one is "understood")
-1 * 3 = -3
-1 * 6n = -6n

Now your new equation looks like this:
-5n - 10 - 3 - 6n = -12n

Once you've taken care of the grouping symbols (the parentheses), you can simplify the left side by combining like terms:
-11n  - 13  = -12n

From here, get variable terms on one side and plain number (constant) terms on the other:
-11n  -  13  =  -12n
+12n              +12n 
   n    - 13    =    0

Now add 13 to both sides to get your answer:
n  - 13 =    0
   + 13    + 13
    n    =   13

Hope this helps.